6 booksDistributed Systems Title Author Difficulty Priority Designing Data-Intensive Applications Martin Kleppmann Advanced high Designing Distributed Systems Brendan Burns Intermediate high Distributed Systems (Mixu) Mikito Takada Intermediate medium Distributed Systems: Concepts and Design George Coulouris Intermediate high Distributed Systems: Principles and Paradigms Tanenbaum & Van Steen Intermediate high Paxos Made Simple Leslie Lamport Advanced medium